package com.eight.vote.interceptor;

import com.eight.vote.util.JWTUtil;
import com.eight.vote.util.UserHolder;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * <p>
 * //全局拦截器
 * </p>
 *
 * @author 点点星言
 * @since 2022-10-07
 */
public class TokenInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
            throws Exception {
        //1.获取请求头中的token
        String token = request.getHeader("token");
        if (token == null||token.isEmpty()) {
            response.setStatus(401);
            return false;
        }
        String userIdStr = JWTUtil.getUserId(token);
        Long userId = Long.valueOf(userIdStr);
        UserHolder.saveUserId(userId);
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        HandlerInterceptor.super.postHandle(request, response, handler, modelAndView);
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        HandlerInterceptor.super.afterCompletion(request, response, handler, ex);
    }
}
